The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 2026
Filed:
Sep. 07, 2021
Northvolt Ab, Stockholm, SE;
Metal Trade Overseas Ag, Sug, CH;
Cornelia Lantto, Enskede, SE;
Tom Niemi, Karleby, FI;
Pekka Alisaari, Somero, FI;
Esa Lindell, Pori, FI;
Rauno Luoma, Pori, FI;
Tuomo Laukkanen, Sampu, FI;
Pekka Tynjälä, Joensuu, FI;
Ulla Lassi, Kempele, FI;
NORTHVOLT AB, Stockholm, SE;
METAL TRADE OVERSEAS AG, Zug, CH;
Abstract
Battery grade metal sulfate solutions can be prepared directly from electrolytically produced metal objects, such as cathode plates, when these are subjected to an aqueous leaching solution comprising at least one acid leaching agent and a liquid oxidizing agent in a continuous process at elevated temperature and with vigorous mixing. A leaching arrangement comprising a leaching column or reaction vessel is also disclosed.